Release 4.7 drivers/power/pcf50633-charger.c

/* NXP PCF50633 Main Battery Charger Driver
 *
 * (C) 2006-2008 by Openmoko, Inc.
 * Author: Balaji Rao <balajirrao@openmoko.org>
 * All rights reserved.
 *
 * Broken down from monstrous PCF50633 driver mainly by
 * Harald Welte, Andy Green and Werner Almesberger
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/device.h>
#include <linux/sysfs.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>

#include <linux/mfd/pcf50633/core.h>
#include <linux/mfd/pcf50633/mbc.h>


struct pcf50633_mbc {
	
struct pcf50633 *pcf;

	
int adapter_online;
	
int usb_online;

	
struct power_supply *usb;
	
struct power_supply *adapter;
	
struct power_supply *ac;
};



int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
{
	struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
	int ret = 0;
	u8 bits;
	int charging_start = 1;
	u8 mbcs2, chgmod;
	unsigned int mbcc5;

	if (ma >= 1000) {
		bits = PCF50633_MBCC7_USB_1000mA;
		ma = 1000;
	} else if (ma >= 500) {
		bits = PCF50633_MBCC7_USB_500mA;
		ma = 500;
	} else if (ma >= 100) {
		bits = PCF50633_MBCC7_USB_100mA;
		ma = 100;
	} else {
		bits = PCF50633_MBCC7_USB_SUSPEND;
		charging_start = 0;
		ma = 0;
	}

	ret = pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC7,
					PCF50633_MBCC7_USB_MASK, bits);
	if (ret)
		dev_err(pcf->dev, "error setting usb curlim to %d mA\n", ma);
	else
		dev_info(pcf->dev, "usb curlim to %d mA\n", ma);

	/*
         * We limit the charging current to be the USB current limit.
         * The reason is that on pcf50633, when it enters PMU Standby mode,
         * which it does when the device goes "off", the USB current limit
         * reverts to the variant default.  In at least one common case, that
         * default is 500mA.  By setting the charging current to be the same
         * as the USB limit we set here before PMU standby, we enforce it only
         * using the correct amount of current even when the USB current limit
         * gets reset to the wrong thing
         */

	if (mbc->pcf->pdata->charger_reference_current_ma) {
		mbcc5 = (ma << 8) / mbc->pcf->pdata->charger_reference_current_ma;
		if (mbcc5 > 255)
			mbcc5 = 255;
		pcf50633_reg_write(mbc->pcf, PCF50633_REG_MBCC5, mbcc5);
	}

	mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2);
	chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);

	/* If chgmod == BATFULL, setting chgena has no effect.
         * Datasheet says we need to set resume instead but when autoresume is
         * used resume doesn't work. Clear and set chgena instead.
         */
	if (chgmod != PCF50633_MBCS2_MBC_BAT_FULL)
		pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
				PCF50633_MBCC1_CHGENA, PCF50633_MBCC1_CHGENA);
	else {
		pcf50633_reg_clear_bits(pcf, PCF50633_REG_MBCC1,
				PCF50633_MBCC1_CHGENA);
		pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
				PCF50633_MBCC1_CHGENA, PCF50633_MBCC1_CHGENA);
	}

	power_supply_changed(mbc->usb);

	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
balaji rao
balaji rao
256
94.12%
3
60.00%
paul fertser
paul fertser
16
5.88%
2
40.00%
Total
272
100.00%
5
100.00%


EXPORT_SYMBOL_GPL(pcf50633_mbc_usb_curlim_set);



int pcf50633_mbc_get_status(struct pcf50633 *pcf)
{
	struct pcf50633_mbc *mbc  = platform_get_drvdata(pcf->mbc_pdev);
	int status = 0;
	u8 chgmod;

	if (!mbc)
		return 0;

	chgmod = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2)
		& PCF50633_MBCS2_MBC_MASK;

	if (mbc->usb_online)
		status |= PCF50633_MBC_USB_ONLINE;
	if (chgmod == PCF50633_MBCS2_MBC_USB_PRE ||
	    chgmod == PCF50633_MBCS2_MBC_USB_PRE_WAIT ||
	    chgmod == PCF50633_MBCS2_MBC_USB_FAST ||
	    chgmod == PCF50633_MBCS2_MBC_USB_FAST_WAIT)
		status |= PCF50633_MBC_USB_ACTIVE;
	if (mbc->adapter_online)
		status |= PCF50633_MBC_ADAPTER_ONLINE;
	if (chgmod == PCF50633_MBCS2_MBC_ADP_PRE ||
	    chgmod == PCF50633_MBCS2_MBC_ADP_PRE_WAIT ||
	    chgmod == PCF50633_MBCS2_MBC_ADP_FAST ||
	    chgmod == PCF50633_MBCS2_MBC_ADP_FAST_WAIT)
		status |= PCF50633_MBC_ADAPTER_ACTIVE;

	return status;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
balaji rao
balaji rao
64
54.24%
1
50.00%
paul fertser
paul fertser
54
45.76%
1
50.00%
Total
118
100.00%
2
100.00%


EXPORT_SYMBOL_GPL(pcf50633_mbc_get_status);



int pcf50633_mbc_get_usb_online_status(struct pcf50633 *pcf)
{
	struct pcf50633_mbc *mbc  = platform_get_drvdata(pcf->mbc_pdev);

	if (!mbc)
		return 0;

	return mbc->usb_online;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
paul fertser
paul fertser
35
100.00%
1
100.00%
Total
35
100.00%
1
100.00%


EXPORT_SYMBOL_GPL(pcf50633_mbc_get_usb_online_status);


static ssize_t

show_chgmode(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);

	u8 mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2);
	u8 chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);

	return sprintf(buf, "%d\n", chgmod);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
balaji rao
balaji rao
61
100.00%
1
100.00%
Total
61
100.00%
1
100.00%

static DEVICE_ATTR(chgmode, S_IRUGO, show_chgmode, NULL);


static ssize_t

show_usblim(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
	u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) &
						PCF50633_MBCC7_USB_MASK;
	unsigned int ma;

	if (usblim == PCF50633_MBCC7_USB_1000mA)
		ma = 1000;
	else if (usblim == PCF50633_MBCC7_USB_500mA)
		ma = 500;
	else if (usblim == PCF50633_MBCC7_USB_100mA)
		ma = 100;
	else
		ma = 0;

	return sprintf(buf, "%u\n", ma);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
balaji rao
balaji rao
95
100.00%
1
100.00%
Total
95
100.00%
1
100.00%



static ssize_t set_usblim(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
	unsigned long ma;
	int ret;

	ret = kstrtoul(buf, 10, &ma);
	if (ret)
		return ret;

	pcf50633_mbc_usb_curlim_set(mbc->pcf, ma);

	return count;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
balaji rao
balaji rao
70
97.22%
1
50.00%
jingoo han
jingoo han
2
2.78%
1
50.00%
Total
72
100.00%
2
100.00%

static DEVICE_ATTR(usb_curlim, S_IRUGO | S_IWUSR, show_usblim, set_usblim);


static ssize_t

show_chglim(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
	u8 mbcc5 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC5);
	unsigned int ma;

	if (!mbc->pcf->pdata->charger_reference_current_ma)
		return -ENODEV;

	ma = (mbc->pcf->pdata->charger_reference_current_ma *  mbcc5) >> 8;

	return sprintf(buf, "%u\n", ma);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
balaji rao
balaji rao
87
100.00%
2
100.00%
Total
87
100.00%
2
100.00%



static ssize_t set_chglim(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
	unsigned long ma;
	unsigned int mbcc5;
	int ret;

	if (!mbc->pcf->pdata->charger_reference_current_ma)
		return -ENODEV;

	ret = kstrtoul(buf, 10, &ma);
	if (ret)
		return ret;

	mbcc5 = (ma << 8) / mbc->pcf->pdata->charger_reference_current_ma;
	if (mbcc5 > 255)
		mbcc5 = 255;
	pcf50633_reg_write(mbc->pcf, PCF50633_REG_MBCC5, mbcc5);

	return count;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
balaji rao
balaji rao
117
98.32%
3
75.00%
jingoo han
jingoo han
2
1.68%
1
25.00%
Total
119
100.00%
4
100.00%

/*
 * This attribute allows to change MBC charging limit on the fly
 * independently of usb current limit. It also gets set automatically every
 * time usb current limit is changed.
 */
static DEVICE_ATTR(chg_curlim, S_IRUGO | S_IWUSR, show_chglim, set_chglim);


static struct attribute *pcf50633_mbc_sysfs_entries[] = {
	&dev_attr_chgmode.attr,
	&dev_attr_usb_curlim.attr,
	&dev_attr_chg_curlim.attr,
	NULL,
};


static struct attribute_group mbc_attr_group = {
	.name	= NULL,			/* put in device directory */
	.attrs	= pcf50633_mbc_sysfs_entries,
};


static void

pcf50633_mbc_irq_handler(int irq, void *data)
{
	struct pcf50633_mbc *mbc = data;

	/* USB */
	if (irq == PCF50633_IRQ_USBINS) {
		mbc->usb_online = 1;
	} else if (irq == PCF50633_IRQ_USBREM) {
		mbc->usb_online = 0;
		pcf50633_mbc_usb_curlim_set(mbc->pcf, 0);
	}

	/* Adapter */
	if (irq == PCF50633_IRQ_ADPINS)
		mbc->adapter_online = 1;
	else if (irq == PCF50633_IRQ_ADPREM)
		mbc->adapter_online = 0;

	power_supply_changed(mbc->ac);
	power_supply_changed(mbc->usb);
	power_supply_changed(mbc->adapter);

	if (mbc->pcf->pdata->mbc_event_callback)
		mbc->pcf->pdata->mbc_event_callback(mbc->pcf, irq);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
balaji rao
balaji rao
129
98.47%
2
66.67%
sean mcneil
sean mcneil
2
1.53%
1
33.33%
Total
131
100.00%
3
100.00%



static int adapter_get_property(struct power_supply *psy,
			enum power_supply_property psp,
			union power_supply_propval *val)
{
	struct pcf50633_mbc *mbc = power_supply_get_drvdata(psy);
	int ret = 0;

	switch (psp) {
	case POWER_SUPPLY_PROP_ONLINE:
		val->intval =  mbc->adapter_online;
		break;
	default:
		ret = -EINVAL;
		break;
	}
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
balaji rao
balaji rao
62
98.41%
1
50.00%
krzysztof kozlowski
krzysztof kozlowski
1
1.59%
1
50.00%
Total
63
100.00%
2
100.00%



static int usb_get_property(struct power_supply *psy,
			enum power_supply_property psp,
			union power_supply_propval *val)
{
	struct pcf50633_mbc *mbc = power_supply_get_drvdata(psy);
	int ret = 0;
	u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) &
						PCF50633_MBCC7_USB_MASK;

	switch (psp) {
	case POWER_SUPPLY_PROP_ONLINE:
		val->intval = mbc->usb_online &&
				(usblim <= PCF50633_MBCC7_USB_500mA);
		break;
	default:
		ret = -EINVAL;
		break;
	}
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
balaji rao
balaji rao
48
57.83%
1
33.33%
sean mcneil
sean mcneil
34
40.96%
1
33.33%
krzysztof kozlowski
krzysztof kozlowski
1
1.20%
1
33.33%
Total
83
100.00%
3
100.00%



static int ac_get_property(struct power_supply *psy,
			enum power_supply_property psp,
			union power_supply_propval *val)
{
	struct pcf50633_mbc *mbc = power_supply_get_drvdata(psy);
	int ret = 0;
	u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) &
						PCF50633_MBCC7_USB_MASK;

	switch (psp) {
	case POWER_SUPPLY_PROP_ONLINE:
		val->intval = mbc->usb_online &&
				(usblim == PCF50633_MBCC7_USB_1000mA);
		break;
	default:
		ret = -EINVAL;
		break;
	}
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
sean mcneil
sean mcneil
53
63.86%
1
33.33%
balaji rao
balaji rao
29
34.94%
1
33.33%
krzysztof kozlowski
krzysztof kozlowski
1
1.20%
1
33.33%
Total
83
100.00%
3
100.00%


static enum power_supply_property power_props[] = {
	POWER_SUPPLY_PROP_ONLINE,
};


static const u8 mbc_irq_handlers[] = {
	PCF50633_IRQ_ADPINS,
	PCF50633_IRQ_ADPREM,
	PCF50633_IRQ_USBINS,
	PCF50633_IRQ_USBREM,
	PCF50633_IRQ_BATFULL,
	PCF50633_IRQ_CHGHALT,
	PCF50633_IRQ_THLIMON,
	PCF50633_IRQ_THLIMOFF,
	PCF50633_IRQ_USBLIMON,
	PCF50633_IRQ_USBLIMOFF,
	PCF50633_IRQ_LOWSYS,
	PCF50633_IRQ_LOWBAT,
};


static const struct power_supply_desc pcf50633_mbc_adapter_desc = {
	.name		= "adapter",
	.type		= POWER_SUPPLY_TYPE_MAINS,
	.properties	= power_props,
	.num_properties	= ARRAY_SIZE(power_props),
	.get_property	= &adapter_get_property,
};


static const struct power_supply_desc pcf50633_mbc_usb_desc = {
	.name		= "usb",
	.type		= POWER_SUPPLY_TYPE_USB,
	.properties	= power_props,
	.num_properties	= ARRAY_SIZE(power_props),
	.get_property	= usb_get_property,
};


static const struct power_supply_desc pcf50633_mbc_ac_desc = {
	.name		= "ac",
	.type		= POWER_SUPPLY_TYPE_MAINS,
	.properties	= power_props,
	.num_properties	= ARRAY_SIZE(power_props),
	.get_property	= ac_get_property,
};



static int pcf50633_mbc_probe(struct platform_device *pdev)
{
	struct power_supply_config psy_cfg = {};
	struct pcf50633_mbc *mbc;
	int ret;
	int i;
	u8 mbcs1;

	mbc = devm_kzalloc(&pdev->dev, sizeof(*mbc), GFP_KERNEL);
	if (!mbc)
		return -ENOMEM;

	platform_set_drvdata(pdev, mbc);
	mbc->pcf = dev_to_pcf50633(pdev->dev.parent);

	/* Set up IRQ handlers */
	for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)
		pcf50633_register_irq(mbc->pcf, mbc_irq_handlers[i],
					pcf50633_mbc_irq_handler, mbc);

	psy_cfg.supplied_to		= mbc->pcf->pdata->batteries;
	psy_cfg.num_supplicants		= mbc->pcf->pdata->num_batteries;
	psy_cfg.drv_data		= mbc;

	/* Create power supplies */
	mbc->adapter = power_supply_register(&pdev->dev,
					     &pcf50633_mbc_adapter_desc,
					     &psy_cfg);
	if (IS_ERR(mbc->adapter)) {
		dev_err(mbc->pcf->dev, "failed to register adapter\n");
		ret = PTR_ERR(mbc->adapter);
		return ret;
	}

	mbc->usb = power_supply_register(&pdev->dev, &pcf50633_mbc_usb_desc,
					 &psy_cfg);
	if (IS_ERR(mbc->usb)) {
		dev_err(mbc->pcf->dev, "failed to register usb\n");
		power_supply_unregister(mbc->adapter);
		ret = PTR_ERR(mbc->usb);
		return ret;
	}

	mbc->ac = power_supply_register(&pdev->dev, &pcf50633_mbc_ac_desc,
					&psy_cfg);
	if (IS_ERR(mbc->ac)) {
		dev_err(mbc->pcf->dev, "failed to register ac\n");
		power_supply_unregister(mbc->adapter);
		power_supply_unregister(mbc->usb);
		ret = PTR_ERR(mbc->ac);
		return ret;
	}

	ret = sysfs_create_group(&pdev->dev.kobj, &mbc_attr_group);
	if (ret)
		dev_err(mbc->pcf->dev, "failed to create sysfs entries\n");

	mbcs1 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS1);
	if (mbcs1 & PCF50633_MBCS1_USBPRES)
		pcf50633_mbc_irq_handler(PCF50633_IRQ_USBINS, mbc);
	if (mbcs1 & PCF50633_MBCS1_ADAPTPRES)
		pcf50633_mbc_irq_handler(PCF50633_IRQ_ADPINS, mbc);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
balaji rao
balaji rao
241
61.95%
2
28.57%
krzysztof kozlowski
krzysztof kozlowski
96
24.68%
2
28.57%
sean mcneil
sean mcneil
39
10.03%
1
14.29%
lars-peter clausen
lars-peter clausen
7
1.80%
1
14.29%
jingoo han
jingoo han
6
1.54%
1
14.29%
Total
389
100.00%
7
100.00%



static int pcf50633_mbc_remove(struct platform_device *pdev)
{
	struct pcf50633_mbc *mbc = platform_get_drvdata(pdev);
	int i;

	/* Remove IRQ handlers */
	for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)
		pcf50633_free_irq(mbc->pcf, mbc_irq_handlers[i]);

	sysfs_remove_group(&pdev->dev.kobj, &mbc_attr_group);
	power_supply_unregister(mbc->usb);
	power_supply_unregister(mbc->adapter);
	power_supply_unregister(mbc->ac);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
balaji rao
balaji rao
75
83.33%
2
50.00%
axel lin
axel lin
13
14.44%
1
25.00%
sean mcneil
sean mcneil
2
2.22%
1
25.00%
Total
90
100.00%
4
100.00%


static struct platform_driver pcf50633_mbc_driver = {
	.driver = {
		.name = "pcf50633-mbc",
        },
	.probe = pcf50633_mbc_probe,
	.remove = pcf50633_mbc_remove,
};


module_platform_driver(pcf50633_mbc_driver);

MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
MODULE_DESCRIPTION("PCF50633 mbc driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:pcf50633-mbc");
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
balaji rao
balaji rao
1579
76.43%
3
21.43%
krzysztof kozlowski
krzysztof kozlowski
211
10.21%
2
14.29%
sean mcneil
sean mcneil
132
6.39%
1
7.14%
paul fertser
paul fertser
110
5.32%
2
14.29%
axel lin
axel lin
14
0.68%
2
14.29%
jingoo han
jingoo han
10
0.48%
2
14.29%
lars-peter clausen
lars-peter clausen
7
0.34%
1
7.14%
tejun heo
tejun heo
3
0.15%
1
7.14%
Total
2066
100.00%
14
100.00%
  
Directory: drivers/power

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.